diff options
| author | Eric Anholt <eric@anholt.net> | 2016-12-14 11:46:14 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2017-02-01 12:51:22 -0800 |
| commit | d17a1bb9b801f7046af29c31b946a9619bfe382d (patch) | |
| tree | c0e2db3ed55437646c3cc0138536955606349f7e /drivers/gpu/drm/vc4/vc4_hvs.c | |
| parent | 969218fee101af5335314e8521fb1a29e49e560b (diff) | |
| download | linux-d17a1bb9b801f7046af29c31b946a9619bfe382d.tar.bz2 | |
drm/vc4: Set up SCALER_DISPCTRL at boot.
We want the HVS on, obviously, and we also want DSP3 (PV1's source) to
be muxed from HVS channel 2 like we expect in vc4_crtc.c. The
firmware wasn't setting the DSP3 mux up when both the LCD and HDMI
were disabled.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161214194621.16499-5-eric@anholt.net
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_hvs.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hvs.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index 6fbab1c82cb1..fc68b1b4da52 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -170,6 +170,7 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) struct vc4_dev *vc4 = drm->dev_private; struct vc4_hvs *hvs = NULL; int ret; + u32 dispctrl; hvs = devm_kzalloc(&pdev->dev, sizeof(*hvs), GFP_KERNEL); if (!hvs) @@ -211,6 +212,19 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) return ret; vc4->hvs = hvs; + + dispctrl = HVS_READ(SCALER_DISPCTRL); + + dispctrl |= SCALER_DISPCTRL_ENABLE; + + /* Set DSP3 (PV1) to use HVS channel 2, which would otherwise + * be unused. + */ + dispctrl &= ~SCALER_DISPCTRL_DSP3_MUX_MASK; + dispctrl |= VC4_SET_FIELD(2, SCALER_DISPCTRL_DSP3_MUX); + + HVS_WRITE(SCALER_DISPCTRL, dispctrl); + return 0; } |